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openldap/servers/slapd/overlays/constraint.c
Pierangelo Masarati 3be02f83df handle softadd/softdel (internal modifications; ITS#7773)
2013-12-28 16:20:08 +01:00

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/* $OpenLDAP$ */
/* constraint.c - Overlay to constrain attributes to certain values */
/*
* Copyright 2003-2004 Hewlett-Packard Company
* Copyright 2007 Emmanuel Dreyfus
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/*
* Authors: Neil Dunbar <neil.dunbar@hp.com>
* Emmannuel Dreyfus <manu@netbsd.org>
*/
#include "portable.h"
#ifdef SLAPD_OVER_CONSTRAINT
#include <stdio.h>
#include <ac/string.h>
#include <ac/socket.h>
#include <ac/regex.h>
#include "lutil.h"
#include "slap.h"
#include "config.h"
/*
* This overlay limits the values which can be placed into an
* attribute, over and above the limits placed by the schema.
*
* It traps only LDAP adds and modify commands (and only seeks to
* control the add and modify value mods of a modify)
*/
#define REGEX_STR "regex"
#define URI_STR "uri"
#define SET_STR "set"
#define SIZE_STR "size"
#define COUNT_STR "count"
/*
* Linked list of attribute constraints which we should enforce.
* This is probably a sub optimal structure - some form of sorted
* array would be better if the number of attributes contrained is
* likely to be much bigger than 4 or 5. We stick with a list for
* the moment.
*/
typedef struct constraint {
struct constraint *ap_next;
AttributeDescription **ap;
LDAPURLDesc *restrict_lud;
struct berval restrict_ndn;
Filter *restrict_filter;
struct berval restrict_val;
regex_t *re;
LDAPURLDesc *lud;
int set;
size_t size;
size_t count;
AttributeDescription **attrs;
struct berval val; /* constraint value */
struct berval dn;
struct berval filter;
} constraint;
enum {
CONSTRAINT_ATTRIBUTE = 1
};
static ConfigDriver constraint_cf_gen;
static ConfigTable constraintcfg[] = {
{ "constraint_attribute", "attribute[list]> (regex|uri|set|size|count) <value> [<restrict URI>]",
4, 0, 0, ARG_MAGIC | CONSTRAINT_ATTRIBUTE, constraint_cf_gen,
"( OLcfgOvAt:13.1 NAME 'olcConstraintAttribute' "
"DESC 'constraint for list of attributes' "
"EQUALITY caseIgnoreMatch "
"SYNTAX OMsDirectoryString )", NULL, NULL },
{ NULL, NULL, 0, 0, 0, ARG_IGNORED }
};
static ConfigOCs constraintocs[] = {
{ "( OLcfgOvOc:13.1 "
"NAME 'olcConstraintConfig' "
"DESC 'Constraint overlay configuration' "
"SUP olcOverlayConfig "
"MAY ( olcConstraintAttribute ) )",
Cft_Overlay, constraintcfg },
{ NULL, 0, NULL }
};
static void
constraint_free( constraint *cp, int freeme )
{
if (cp->restrict_lud)
ldap_free_urldesc(cp->restrict_lud);
if (!BER_BVISNULL(&cp->restrict_ndn))
ch_free(cp->restrict_ndn.bv_val);
if (cp->restrict_filter != NULL && cp->restrict_filter != slap_filter_objectClass_pres)
filter_free(cp->restrict_filter);
if (!BER_BVISNULL(&cp->restrict_val))
ch_free(cp->restrict_val.bv_val);
if (cp->re) {
regfree(cp->re);
ch_free(cp->re);
}
if (!BER_BVISNULL(&cp->val))
ch_free(cp->val.bv_val);
if (cp->lud)
ldap_free_urldesc(cp->lud);
if (cp->attrs)
ch_free(cp->attrs);
if (cp->ap)
ch_free(cp->ap);
if (freeme)
ch_free(cp);
}
static int
constraint_cf_gen( ConfigArgs *c )
{
slap_overinst *on = (slap_overinst *)(c->bi);
constraint *cn = on->on_bi.bi_private, *cp;
struct berval bv;
int i, rc = 0;
constraint ap = { NULL };
const char *text = NULL;
switch ( c->op ) {
case SLAP_CONFIG_EMIT:
switch (c->type) {
case CONSTRAINT_ATTRIBUTE:
for (cp=cn; cp; cp=cp->ap_next) {
char *s;
char *tstr = NULL;
int quotes = 0;
int j;
size_t val;
char val_buf[SLAP_TEXT_BUFLEN] = { '\0' };
bv.bv_len = STRLENOF(" ");
for (j = 0; cp->ap[j]; j++) {
bv.bv_len += cp->ap[j]->ad_cname.bv_len;
}
/* room for commas */
bv.bv_len += j - 1;
if (cp->re) {
tstr = REGEX_STR;
quotes = 1;
} else if (cp->lud) {
tstr = URI_STR;
quotes = 1;
} else if (cp->set) {
tstr = SET_STR;
quotes = 1;
} else if (cp->size) {
tstr = SIZE_STR;
val = cp->size;
} else if (cp->count) {
tstr = COUNT_STR;
val = cp->count;
}
bv.bv_len += strlen(tstr);
bv.bv_len += cp->val.bv_len + 2*quotes;
if (cp->restrict_lud != NULL) {
bv.bv_len += cp->restrict_val.bv_len + STRLENOF(" restrict=\"\"");
}
if (cp->count || cp->size) {
int len = snprintf(val_buf, sizeof(val_buf), "%zd", val);
if (len <= 0) {
/* error */
return -1;
}
bv.bv_len += len;
}
s = bv.bv_val = ch_malloc(bv.bv_len + 1);
s = lutil_strncopy( s, cp->ap[0]->ad_cname.bv_val, cp->ap[0]->ad_cname.bv_len );
for (j = 1; cp->ap[j]; j++) {
*s++ = ',';
s = lutil_strncopy( s, cp->ap[j]->ad_cname.bv_val, cp->ap[j]->ad_cname.bv_len );
}
*s++ = ' ';
s = lutil_strcopy( s, tstr );
*s++ = ' ';
if (cp->count || cp->size) {
s = lutil_strcopy( s, val_buf );
} else {
if ( quotes ) *s++ = '"';
s = lutil_strncopy( s, cp->val.bv_val, cp->val.bv_len );
if ( quotes ) *s++ = '"';
}
if (cp->restrict_lud != NULL) {
s = lutil_strcopy( s, " restrict=\"" );
s = lutil_strncopy( s, cp->restrict_val.bv_val, cp->restrict_val.bv_len );
*s++ = '"';
}
*s = '\0';
rc = value_add_one( &c->rvalue_vals, &bv );
if (rc == LDAP_SUCCESS)
rc = value_add_one( &c->rvalue_nvals, &bv );
ch_free(bv.bv_val);
if (rc) return rc;
}
break;
default:
abort();
break;
}
break;
case LDAP_MOD_DELETE:
switch (c->type) {
case CONSTRAINT_ATTRIBUTE:
if (!cn) break; /* nothing to do */
if (c->valx < 0) {
/* zap all constraints */
while (cn) {
cp = cn->ap_next;
constraint_free( cn, 1 );
cn = cp;
}
on->on_bi.bi_private = NULL;
} else {
constraint **cpp;
/* zap constraint numbered 'valx' */
for(i=0, cp = cn, cpp = &cn;
(cp) && (i<c->valx);
i++, cpp = &cp->ap_next, cp = *cpp);
if (cp) {
/* zap cp, and join cpp to cp->ap_next */
*cpp = cp->ap_next;
constraint_free( cp, 1 );
}
on->on_bi.bi_private = cn;
}
break;
default:
abort();
break;
}
break;
case SLAP_CONFIG_ADD:
case LDAP_MOD_ADD:
switch (c->type) {
case CONSTRAINT_ATTRIBUTE: {
int j;
char **attrs = ldap_str2charray( c->argv[1], "," );
for ( j = 0; attrs[j]; j++)
/* just count */ ;
ap.ap = ch_calloc( sizeof(AttributeDescription*), j + 1 );
for ( j = 0; attrs[j]; j++) {
if ( slap_str2ad( attrs[j], &ap.ap[j], &text ) ) {
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s <%s>: %s\n", c->argv[0], attrs[j], text );
rc = ARG_BAD_CONF;
goto done;
}
}
if ( strcasecmp( c->argv[2], REGEX_STR ) == 0) {
int err;
ap.re = ch_malloc( sizeof(regex_t) );
if ((err = regcomp( ap.re,
c->argv[3], REG_EXTENDED )) != 0) {
char errmsg[1024];
regerror( err, ap.re, errmsg, sizeof(errmsg) );
ch_free(ap.re);
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: Illegal regular expression \"%s\": Error %s",
c->argv[0], c->argv[1], c->argv[3], errmsg);
ap.re = NULL;
rc = ARG_BAD_CONF;
goto done;
}
ber_str2bv( c->argv[3], 0, 1, &ap.val );
} else if ( strcasecmp( c->argv[2], SIZE_STR ) == 0 ) {
size_t size;
if ( ( size = atoi(c->argv[3]) ) != 0 )
ap.size = size;
} else if ( strcasecmp( c->argv[2], COUNT_STR ) == 0 ) {
size_t count;
if ( ( count = atoi(c->argv[3]) ) != 0 )
ap.count = count;
} else if ( strcasecmp( c->argv[2], URI_STR ) == 0 ) {
int err;
err = ldap_url_parse(c->argv[3], &ap.lud);
if ( err != LDAP_URL_SUCCESS ) {
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: Invalid URI \"%s\"",
c->argv[0], c->argv[1], c->argv[3]);
rc = ARG_BAD_CONF;
goto done;
}
if (ap.lud->lud_host != NULL) {
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: unsupported hostname in URI \"%s\"",
c->argv[0], c->argv[1], c->argv[3]);
ldap_free_urldesc(ap.lud);
rc = ARG_BAD_CONF;
goto done;
}
for ( i=0; ap.lud->lud_attrs[i]; i++);
/* FIXME: This is worthless without at least one attr */
if ( i ) {
ap.attrs = ch_malloc( (i+1)*sizeof(AttributeDescription *));
for ( i=0; ap.lud->lud_attrs[i]; i++) {
ap.attrs[i] = NULL;
if ( slap_str2ad( ap.lud->lud_attrs[i], &ap.attrs[i], &text ) ) {
ch_free( ap.attrs );
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s <%s>: %s\n", c->argv[0], ap.lud->lud_attrs[i], text );
rc = ARG_BAD_CONF;
goto done;
}
}
ap.attrs[i] = NULL;
}
if (ap.lud->lud_dn == NULL) {
ap.lud->lud_dn = ch_strdup("");
} else {
struct berval dn, ndn;
ber_str2bv( ap.lud->lud_dn, 0, 0, &dn );
if (dnNormalize( 0, NULL, NULL, &dn, &ndn, NULL ) ) {
/* cleanup */
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: URI %s DN normalization failed",
c->argv[0], c->argv[1], c->argv[3] );
Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
"%s: %s\n", c->log, c->cr_msg, 0 );
rc = ARG_BAD_CONF;
goto done;
}
ldap_memfree( ap.lud->lud_dn );
ap.lud->lud_dn = ndn.bv_val;
}
if (ap.lud->lud_filter == NULL) {
ap.lud->lud_filter = ch_strdup("objectClass=*");
} else if ( ap.lud->lud_filter[0] == '(' ) {
ber_len_t len = strlen( ap.lud->lud_filter );
if ( ap.lud->lud_filter[len - 1] != ')' ) {
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: invalid URI filter: %s",
c->argv[0], c->argv[1], ap.lud->lud_filter );
rc = ARG_BAD_CONF;
goto done;
}
AC_MEMCPY( &ap.lud->lud_filter[0], &ap.lud->lud_filter[1], len - 2 );
ap.lud->lud_filter[len - 2] = '\0';
}
ber_str2bv( c->argv[3], 0, 1, &ap.val );
} else if ( strcasecmp( c->argv[2], SET_STR ) == 0 ) {
ap.set = 1;
ber_str2bv( c->argv[3], 0, 1, &ap.val );
} else {
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: Unknown constraint type: %s",
c->argv[0], c->argv[1], c->argv[2] );
rc = ARG_BAD_CONF;
goto done;
}
if ( c->argc > 4 ) {
int argidx;
for ( argidx = 4; argidx < c->argc; argidx++ ) {
if ( strncasecmp( c->argv[argidx], "restrict=", STRLENOF("restrict=") ) == 0 ) {
int err;
char *arg = c->argv[argidx] + STRLENOF("restrict=");
err = ldap_url_parse(arg, &ap.restrict_lud);
if ( err != LDAP_URL_SUCCESS ) {
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: Invalid restrict URI \"%s\"",
c->argv[0], c->argv[1], arg);
rc = ARG_BAD_CONF;
goto done;
}
if (ap.restrict_lud->lud_host != NULL) {
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: unsupported hostname in restrict URI \"%s\"",
c->argv[0], c->argv[1], arg);
rc = ARG_BAD_CONF;
goto done;
}
if ( ap.restrict_lud->lud_attrs != NULL ) {
if ( ap.restrict_lud->lud_attrs[0] != '\0' ) {
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: attrs not allowed in restrict URI %s\n",
c->argv[0], c->argv[1], arg);
rc = ARG_BAD_CONF;
goto done;
}
ldap_memvfree((void *)ap.restrict_lud->lud_attrs);
ap.restrict_lud->lud_attrs = NULL;
}
if (ap.restrict_lud->lud_dn != NULL) {
if (ap.restrict_lud->lud_dn[0] == '\0') {
ldap_memfree(ap.restrict_lud->lud_dn);
ap.restrict_lud->lud_dn = NULL;
} else {
struct berval dn, ndn;
int j;
ber_str2bv(ap.restrict_lud->lud_dn, 0, 0, &dn);
if (dnNormalize(0, NULL, NULL, &dn, &ndn, NULL)) {
/* cleanup */
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: restrict URI %s DN normalization failed",
c->argv[0], c->argv[1], arg );
rc = ARG_BAD_CONF;
goto done;
}
assert(c->be != NULL);
if (c->be->be_nsuffix == NULL) {
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: restrict URI requires suffix",
c->argv[0], c->argv[1] );
rc = ARG_BAD_CONF;
goto done;
}
for ( j = 0; !BER_BVISNULL(&c->be->be_nsuffix[j]); j++) {
if (dnIsSuffix(&ndn, &c->be->be_nsuffix[j])) break;
}
if (BER_BVISNULL(&c->be->be_nsuffix[j])) {
/* error */
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: restrict URI DN %s not within database naming context(s)",
c->argv[0], c->argv[1], dn.bv_val );
rc = ARG_BAD_CONF;
goto done;
}
ap.restrict_ndn = ndn;
}
}
if (ap.restrict_lud->lud_filter != NULL) {
ap.restrict_filter = str2filter(ap.restrict_lud->lud_filter);
if (ap.restrict_filter == NULL) {
/* error */
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: restrict URI filter %s invalid",
c->argv[0], c->argv[1], ap.restrict_lud->lud_filter );
rc = ARG_BAD_CONF;
goto done;
}
}
ber_str2bv(c->argv[argidx] + STRLENOF("restrict="), 0, 1, &ap.restrict_val);
} else {
/* cleanup */
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"%s %s: unrecognized arg #%d (%s)",
c->argv[0], c->argv[1], argidx, c->argv[argidx] );
rc = ARG_BAD_CONF;
goto done;
}
}
}
done:;
if ( rc == LDAP_SUCCESS ) {
constraint *a2 = ch_calloc( sizeof(constraint), 1 );
a2->ap_next = on->on_bi.bi_private;
a2->ap = ap.ap;
a2->re = ap.re;
a2->val = ap.val;
a2->lud = ap.lud;
a2->set = ap.set;
a2->size = ap.size;
a2->count = ap.count;
if ( a2->lud ) {
ber_str2bv(a2->lud->lud_dn, 0, 0, &a2->dn);
ber_str2bv(a2->lud->lud_filter, 0, 0, &a2->filter);
}
a2->attrs = ap.attrs;
a2->restrict_lud = ap.restrict_lud;
a2->restrict_ndn = ap.restrict_ndn;
a2->restrict_filter = ap.restrict_filter;
a2->restrict_val = ap.restrict_val;
on->on_bi.bi_private = a2;
} else {
Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
"%s: %s\n", c->log, c->cr_msg, 0 );
constraint_free( &ap, 0 );
}
ldap_memvfree((void**)attrs);
} break;
default:
abort();
break;
}
break;
default:
abort();
}
return rc;
}
static int
constraint_uri_cb( Operation *op, SlapReply *rs )
{
if(rs->sr_type == REP_SEARCH) {
int *foundp = op->o_callback->sc_private;
*foundp = 1;
Debug(LDAP_DEBUG_TRACE, "==> constraint_uri_cb <%s>\n",
rs->sr_entry ? rs->sr_entry->e_name.bv_val : "UNKNOWN_DN", 0, 0);
}
return 0;
}
static int
constraint_violation( constraint *c, struct berval *bv, Operation *op )
{
if ((!c) || (!bv)) return LDAP_SUCCESS;
if ((c->re) &&
(regexec(c->re, bv->bv_val, 0, NULL, 0) == REG_NOMATCH))
return LDAP_CONSTRAINT_VIOLATION; /* regular expression violation */
if ((c->size) && (bv->bv_len > c->size))
return LDAP_CONSTRAINT_VIOLATION; /* size violation */
if (c->lud) {
Operation nop = *op;
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
slap_callback cb;
int i;
int found = 0;
int rc;
size_t len;
struct berval filterstr;
char *ptr;
cb.sc_next = NULL;
cb.sc_response = constraint_uri_cb;
cb.sc_cleanup = NULL;
cb.sc_private = &found;
nop.o_protocol = LDAP_VERSION3;
nop.o_tag = LDAP_REQ_SEARCH;
nop.o_time = slap_get_time();
if (c->lud->lud_dn) {
struct berval dn;
ber_str2bv(c->lud->lud_dn, 0, 0, &dn);
nop.o_req_dn = dn;
nop.o_req_ndn = dn;
nop.o_bd = select_backend(&nop.o_req_ndn, 1 );
if (!nop.o_bd) {
return LDAP_NO_SUCH_OBJECT; /* unexpected error */
}
if (!nop.o_bd->be_search) {
return LDAP_OTHER; /* unexpected error */
}
} else {
nop.o_req_dn = nop.o_bd->be_nsuffix[0];
nop.o_req_ndn = nop.o_bd->be_nsuffix[0];
nop.o_bd = on->on_info->oi_origdb;
}
nop.o_do_not_cache = 1;
nop.o_callback = &cb;
nop.ors_scope = c->lud->lud_scope;
nop.ors_deref = LDAP_DEREF_NEVER;
nop.ors_slimit = SLAP_NO_LIMIT;
nop.ors_tlimit = SLAP_NO_LIMIT;
nop.ors_limit = NULL;
nop.ors_attrsonly = 0;
nop.ors_attrs = slap_anlist_no_attrs;
len = STRLENOF("(&(") +
c->filter.bv_len +
STRLENOF(")(|");
for (i = 0; c->attrs[i]; i++) {
len += STRLENOF("(") +
c->attrs[i]->ad_cname.bv_len +
STRLENOF("=") +
bv->bv_len +
STRLENOF(")");
}
len += STRLENOF("))");
filterstr.bv_len = len;
filterstr.bv_val = op->o_tmpalloc(len + 1, op->o_tmpmemctx);
ptr = filterstr.bv_val +
snprintf(filterstr.bv_val, len, "(&(%s)(|", c->lud->lud_filter);
for (i = 0; c->attrs[i]; i++) {
*ptr++ = '(';
ptr = lutil_strcopy( ptr, c->attrs[i]->ad_cname.bv_val );
*ptr++ = '=';
ptr = lutil_strcopy( ptr, bv->bv_val );
*ptr++ = ')';
}
*ptr++ = ')';
*ptr++ = ')';
*ptr++ = '\0';
nop.ors_filterstr = filterstr;
nop.ors_filter = str2filter_x(&nop, filterstr.bv_val);
if ( nop.ors_filter == NULL ) {
Debug( LDAP_DEBUG_ANY,
"%s constraint_violation uri filter=\"%s\" invalid\n",
op->o_log_prefix, filterstr.bv_val, 0 );
rc = LDAP_OTHER;
} else {
SlapReply nrs = { REP_RESULT };
Debug(LDAP_DEBUG_TRACE,
"==> constraint_violation uri filter = %s\n",
filterstr.bv_val, 0, 0);
rc = nop.o_bd->be_search( &nop, &nrs );
Debug(LDAP_DEBUG_TRACE,
"==> constraint_violation uri rc = %d, found = %d\n",
rc, found, 0);
}
op->o_tmpfree(filterstr.bv_val, op->o_tmpmemctx);
if ((rc != LDAP_SUCCESS) && (rc != LDAP_NO_SUCH_OBJECT)) {
return rc; /* unexpected error */
}
if (!found)
return LDAP_CONSTRAINT_VIOLATION; /* constraint violation */
}
return LDAP_SUCCESS;
}
static char *
print_message( struct berval *errtext, AttributeDescription *a )
{
char *ret;
int sz;
sz = errtext->bv_len + sizeof(" on ") + a->ad_cname.bv_len;
ret = ch_malloc(sz);
snprintf( ret, sz, "%s on %s", errtext->bv_val, a->ad_cname.bv_val );
return ret;
}
static unsigned
constraint_count_attr(Entry *e, AttributeDescription *ad)
{
struct Attribute *a;
if ((a = attr_find(e->e_attrs, ad)) != NULL)
return a->a_numvals;
return 0;
}
static int
constraint_check_restrict( Operation *op, constraint *c, Entry *e )
{
assert( c->restrict_lud != NULL );
if ( c->restrict_lud->lud_dn != NULL ) {
int diff = e->e_nname.bv_len - c->restrict_ndn.bv_len;
if ( diff < 0 ) {
return 0;
}
if ( c->restrict_lud->lud_scope == LDAP_SCOPE_BASE ) {
return bvmatch( &e->e_nname, &c->restrict_ndn );
}
if ( !dnIsSuffix( &e->e_nname, &c->restrict_ndn ) ) {
return 0;
}
if ( c->restrict_lud->lud_scope != LDAP_SCOPE_SUBTREE ) {
struct berval pdn;
if ( diff == 0 ) {
return 0;
}
dnParent( &e->e_nname, &pdn );
if ( c->restrict_lud->lud_scope == LDAP_SCOPE_ONELEVEL
&& pdn.bv_len != c->restrict_ndn.bv_len )
{
return 0;
}
}
}
if ( c->restrict_filter != NULL ) {
int rc;
struct berval save_dn = op->o_dn, save_ndn = op->o_ndn;
op->o_dn = op->o_bd->be_rootdn;
op->o_ndn = op->o_bd->be_rootndn;
rc = test_filter( op, e, c->restrict_filter );
op->o_dn = save_dn;
op->o_ndn = save_ndn;
if ( rc != LDAP_COMPARE_TRUE ) {
return 0;
}
}
return 1;
}
static int
constraint_add( Operation *op, SlapReply *rs )
{
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
Attribute *a;
constraint *c = on->on_bi.bi_private, *cp;
BerVarray b = NULL;
int i;
struct berval rsv = BER_BVC("add breaks constraint");
int rc;
char *msg = NULL;
if (get_relax(op) || SLAPD_SYNC_IS_SYNCCONN( op->o_connid )) {
return SLAP_CB_CONTINUE;
}
if ((a = op->ora_e->e_attrs) == NULL) {
op->o_bd->bd_info = (BackendInfo *)(on->on_info);
send_ldap_error(op, rs, LDAP_INVALID_SYNTAX,
"constraint_add: no attrs");
return(rs->sr_err);
}
for(; a; a = a->a_next ) {
/* we don't constrain operational attributes */
if (is_at_operational(a->a_desc->ad_type)) continue;
for(cp = c; cp; cp = cp->ap_next) {
int j;
for (j = 0; cp->ap[j]; j++) {
if (cp->ap[j] == a->a_desc) break;
}
if (cp->ap[j] == NULL) continue;
if ((b = a->a_vals) == NULL) continue;
if (cp->restrict_lud != NULL && constraint_check_restrict(op, cp, op->ora_e) == 0) {
continue;
}
Debug(LDAP_DEBUG_TRACE,
"==> constraint_add, "
"a->a_numvals = %u, cp->count = %lu\n",
a->a_numvals, (unsigned long) cp->count, 0);
if ((cp->count != 0) && (a->a_numvals > cp->count)) {
rc = LDAP_CONSTRAINT_VIOLATION;
goto add_violation;
}
for ( i = 0; b[i].bv_val; i++ ) {
rc = constraint_violation( cp, &b[i], op );
if ( rc ) {
goto add_violation;
}
}
if (cp->set && acl_match_set(&cp->val, op, op->ora_e, NULL) == 0) {
rc = LDAP_CONSTRAINT_VIOLATION;
goto add_violation; /* constraint violation */
}
}
}
/* Default is to just fall through to the normal processing */
return SLAP_CB_CONTINUE;
add_violation:
op->o_bd->bd_info = (BackendInfo *)(on->on_info);
if (rc == LDAP_CONSTRAINT_VIOLATION ) {
msg = print_message( &rsv, a->a_desc );
}
send_ldap_error(op, rs, rc, msg );
ch_free(msg);
return (rs->sr_err);
}
static int
constraint_check_count_violation( Modifications *m, Entry *target_entry, constraint *cp )
{
BerVarray b = NULL;
unsigned ce = 0;
unsigned ca;
int j;
for ( j = 0; cp->ap[j]; j++ ) {
/* Get this attribute count */
if ( target_entry )
ce = constraint_count_attr( target_entry, cp->ap[j] );
for( ; m; m = m->sml_next ) {
if ( cp->ap[j] == m->sml_desc ) {
ca = m->sml_numvals;
switch ( m->sml_op ) {
case LDAP_MOD_DELETE:
case SLAP_MOD_SOFTDEL:
if ( !ca || ca > ce ) {
ce = 0;
} else {
/* No need to check for values' validity. Invalid values
* cause the whole transaction to die anyway. */
ce -= ca;
}
break;
case LDAP_MOD_ADD:
case SLAP_MOD_SOFTADD:
ce += ca;
break;
case LDAP_MOD_REPLACE:
ce = ca;
break;
#if 0
/* TODO */
case handle SLAP_MOD_ADD_IF_NOT_PRESENT:
#endif
default:
/* impossible! assert? */
return 1;
}
Debug(LDAP_DEBUG_TRACE,
"==> constraint_check_count_violation ce = %u, "
"ca = %u, cp->count = %lu\n",
ce, ca, (unsigned long) cp->count);
}
}
}
return ( ce > cp->count );
}
static int
constraint_update( Operation *op, SlapReply *rs )
{
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
Backend *be = op->o_bd;
constraint *c = on->on_bi.bi_private, *cp;
Entry *target_entry = NULL, *target_entry_copy = NULL;
Modifications *modlist, *m;
BerVarray b = NULL;
int i;
struct berval rsv = BER_BVC("modify breaks constraint");
int rc;
char *msg = NULL;
int is_v;
if (get_relax(op) || SLAPD_SYNC_IS_SYNCCONN( op->o_connid )) {
return SLAP_CB_CONTINUE;
}
switch ( op->o_tag ) {
case LDAP_REQ_MODIFY:
modlist = op->orm_modlist;
break;
case LDAP_REQ_MODRDN:
modlist = op->orr_modlist;
break;
default:
/* impossible! assert? */
return LDAP_OTHER;
}
Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE, "constraint_update()\n", 0,0,0);
if ((m = modlist) == NULL) {
op->o_bd->bd_info = (BackendInfo *)(on->on_info);
send_ldap_error(op, rs, LDAP_INVALID_SYNTAX,
"constraint_update() got null modlist");
return(rs->sr_err);
}
op->o_bd = on->on_info->oi_origdb;
rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &target_entry );
op->o_bd = be;
/* let the backend send the error */
if ( target_entry == NULL )
return SLAP_CB_CONTINUE;
/* Do we need to count attributes? */
for(cp = c; cp; cp = cp->ap_next) {
if (cp->count != 0) {
if (rc != 0 || target_entry == NULL) {
Debug(LDAP_DEBUG_TRACE,
"==> constraint_update rc = %d DN=\"%s\"%s\n",
rc, op->o_req_ndn.bv_val,
target_entry ? "" : " not found" );
if ( rc == 0 )
rc = LDAP_CONSTRAINT_VIOLATION;
goto mod_violation;
}
if (cp->restrict_lud && constraint_check_restrict(op, cp, target_entry) == 0) {
continue;
}
is_v = constraint_check_count_violation(m, target_entry, cp);
Debug(LDAP_DEBUG_TRACE,
"==> constraint_update is_v: %d\n", is_v, 0, 0);
if (is_v) {
rc = LDAP_CONSTRAINT_VIOLATION;
goto mod_violation;
}
}
}
rc = LDAP_CONSTRAINT_VIOLATION;
for(;m; m = m->sml_next) {
unsigned ce = 0;
if (is_at_operational( m->sml_desc->ad_type )) continue;
if ((( m->sml_op & LDAP_MOD_OP ) != LDAP_MOD_ADD) &&
(( m->sml_op & LDAP_MOD_OP ) != LDAP_MOD_REPLACE) &&
(( m->sml_op & LDAP_MOD_OP ) != LDAP_MOD_DELETE))
continue;
/* we only care about ADD and REPLACE modifications */
/* and DELETE are used to track attribute count */
if ((( b = m->sml_values ) == NULL ) || (b[0].bv_val == NULL))
continue;
for(cp = c; cp; cp = cp->ap_next) {
int j;
for (j = 0; cp->ap[j]; j++) {
if (cp->ap[j] == m->sml_desc) {
break;
}
}
if (cp->ap[j] == NULL) continue;
if (cp->restrict_lud != NULL && constraint_check_restrict(op, cp, target_entry) == 0) {
continue;
}
/* DELETE are to be ignored beyond this point */
if (( m->sml_op & LDAP_MOD_OP ) == LDAP_MOD_DELETE)
continue;
for ( i = 0; b[i].bv_val; i++ ) {
rc = constraint_violation( cp, &b[i], op );
if ( rc ) {
goto mod_violation;
}
}
if (cp->set && target_entry) {
if (target_entry_copy == NULL) {
Modifications *ml;
target_entry_copy = entry_dup(target_entry);
/* if rename, set the new entry's name
* (in normalized form only) */
if ( op->o_tag == LDAP_REQ_MODRDN ) {
struct berval pdn, ndn = BER_BVNULL;
if ( op->orr_nnewSup ) {
pdn = *op->orr_nnewSup;
} else {
dnParent( &target_entry_copy->e_nname, &pdn );
}
build_new_dn( &ndn, &pdn, &op->orr_nnewrdn, NULL );
ber_memfree( target_entry_copy->e_nname.bv_val );
target_entry_copy->e_nname = ndn;
ber_bvreplace( &target_entry_copy->e_name, &ndn );
}
/* apply modifications, in an attempt
* to estimate what the entry would
* look like in case all modifications
* pass */
for ( ml = modlist; ml; ml = ml->sml_next ) {
Modification *mod = &ml->sml_mod;
const char *text;
char textbuf[SLAP_TEXT_BUFLEN];
size_t textlen = sizeof(textbuf);
int err;
switch ( mod->sm_op ) {
case LDAP_MOD_ADD:
err = modify_add_values( target_entry_copy,
mod, get_permissiveModify(op),
&text, textbuf, textlen );
break;
case LDAP_MOD_DELETE:
err = modify_delete_values( target_entry_copy,
mod, get_permissiveModify(op),
&text, textbuf, textlen );
break;
case LDAP_MOD_REPLACE:
err = modify_replace_values( target_entry_copy,
mod, get_permissiveModify(op),
&text, textbuf, textlen );
break;
case LDAP_MOD_INCREMENT:
err = modify_increment_values( target_entry_copy,
mod, get_permissiveModify(op),
&text, textbuf, textlen );
break;
case SLAP_MOD_SOFTADD:
mod->sm_op = LDAP_MOD_ADD;
err = modify_add_values( target_entry_copy,
mod, get_permissiveModify(op),
&text, textbuf, textlen );
mod->sm_op = SLAP_MOD_SOFTADD;
if ( err == LDAP_TYPE_OR_VALUE_EXISTS ) {
err = LDAP_SUCCESS;
}
break;
case SLAP_MOD_SOFTDEL:
mod->sm_op = LDAP_MOD_ADD;
err = modify_delete_values( target_entry_copy,
mod, get_permissiveModify(op),
&text, textbuf, textlen );
mod->sm_op = SLAP_MOD_SOFTDEL;
if ( err == LDAP_NO_SUCH_ATTRIBUTE ) {
err = LDAP_SUCCESS;
}
break;
case SLAP_MOD_ADD_IF_NOT_PRESENT:
if ( attr_find( target_entry_copy->e_attrs, mod->sm_desc ) ) {
err = LDAP_SUCCESS;
break;
}
mod->sm_op = LDAP_MOD_ADD;
err = modify_add_values( target_entry_copy,
mod, get_permissiveModify(op),
&text, textbuf, textlen );
mod->sm_op = SLAP_MOD_ADD_IF_NOT_PRESENT;
break;
default:
err = LDAP_OTHER;
break;
}
if ( err != LDAP_SUCCESS ) {
rc = err;
goto mod_violation;
}
}
}
if ( acl_match_set(&cp->val, op, target_entry_copy, NULL) == 0) {
rc = LDAP_CONSTRAINT_VIOLATION;
goto mod_violation;
}
}
}
}
if (target_entry) {
op->o_bd = on->on_info->oi_origdb;
be_entry_release_r(op, target_entry);
op->o_bd = be;
}
if (target_entry_copy) {
entry_free(target_entry_copy);
}
return SLAP_CB_CONTINUE;
mod_violation:
/* violation */
if (target_entry) {
op->o_bd = on->on_info->oi_origdb;
be_entry_release_r(op, target_entry);
op->o_bd = be;
}
if (target_entry_copy) {
entry_free(target_entry_copy);
}
op->o_bd->bd_info = (BackendInfo *)(on->on_info);
if ( rc == LDAP_CONSTRAINT_VIOLATION ) {
msg = print_message( &rsv, m->sml_desc );
}
send_ldap_error( op, rs, LDAP_CONSTRAINT_VIOLATION, msg );
ch_free(msg);
return (rs->sr_err);
}
static int
constraint_close(
BackendDB *be,
ConfigReply *cr )
{
slap_overinst *on = (slap_overinst *) be->bd_info;
constraint *ap, *a2;
for ( ap = on->on_bi.bi_private; ap; ap = a2 ) {
a2 = ap->ap_next;
constraint_free( ap, 1 );
}
return 0;
}
static slap_overinst constraint_ovl;
#if SLAPD_OVER_CONSTRAINT == SLAPD_MOD_DYNAMIC
static
#endif
int
constraint_initialize( void ) {
int rc;
constraint_ovl.on_bi.bi_type = "constraint";
constraint_ovl.on_bi.bi_db_close = constraint_close;
constraint_ovl.on_bi.bi_op_add = constraint_add;
constraint_ovl.on_bi.bi_op_modify = constraint_update;
constraint_ovl.on_bi.bi_op_modrdn = constraint_update;
constraint_ovl.on_bi.bi_private = NULL;
constraint_ovl.on_bi.bi_cf_ocs = constraintocs;
rc = config_register_schema( constraintcfg, constraintocs );
if (rc) return rc;
return overlay_register( &constraint_ovl );
}
#if SLAPD_OVER_CONSTRAINT == SLAPD_MOD_DYNAMIC
int init_module(int argc, char *argv[]) {
return constraint_initialize();
}
#endif
#endif /* defined(SLAPD_OVER_CONSTRAINT) */
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